EP3582427A1 - Noeud et procédé de programmation de liaison montante et synchronisation de demande de répétition automatique hybride - Google Patents

Noeud et procédé de programmation de liaison montante et synchronisation de demande de répétition automatique hybride Download PDF

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EP3582427A1
EP3582427A1 EP19189125.8A EP19189125A EP3582427A1 EP 3582427 A1 EP3582427 A1 EP 3582427A1 EP 19189125 A EP19189125 A EP 19189125A EP 3582427 A1 EP3582427 A1 EP 3582427A1
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Prior art keywords
cell
configuration
fdd
tdd
control timing
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German (de)
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EP3582427B1 (fr
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Daniel CHEN LARSSON
Jung-Fu Cheng
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1861—Physical mapping arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2615—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using hybrid frequency-time division multiple access [FDMA-TDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • Example embodiments presented herein are directed towards a base station and user equipment, and corresponding methods therein, for determining a one control timing configuration.
  • the control timing configuration provides a subframe timing setting for configuring Physical Uplink Shared Channel (PUSCH) and uplink Hybrid Automatic Retransmission Request Acknowledgment (HARQ-ACK) control timing for a cell serving the user equipment in a multiple cell communications network.
  • the user equipment is served by a Time Division Duplex (TDD) based cell and a Frequency Division Duplex (FDD) based cell.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • LTE Long Term Evolution
  • OFDM Orthogonal Frequency Division Multiplexing
  • DFT Discrete Fourier Transform
  • the basic LTE downlink physical resource can thus be seen as a time-frequency grid, where each resource element corresponds to one OFDM subcarrier during one OFDM symbol interval.
  • resource allocation in LTE is typically described in terms of resource blocks, where a resource block corresponds to one slot, e.g., 0.5 ms, in the time domain and 12 subcarriers in the frequency domain.
  • a pair of two adjacent resource blocks in time direction, e.g., 1.0 ms, is known as a resource block pair.
  • Resource blocks are numbered in the frequency domain, starting with 0 from one end of the system bandwidth.
  • VRB virtual resource blocks
  • PRB physical resource blocks
  • Downlink transmissions are dynamically scheduled, i.e., in each subframe the base station transmits control information regarding which terminals data is transmitted and upon which resource blocks the data is transmitted, in the current downlink subframe.
  • CFI Control Format Indicator
  • the downlink subframe also contains common reference symbols, which are known to the receiver and used for coherent demodulation of, e.g., the control information.
  • the above described resource assignments may also be scheduled on the enhanced Physical Downlink Control Channel (EPDCCH).
  • EPDCCH enhanced Physical Downlink Control Channel
  • PDCH Physical Downlink Control Channel
  • LTE defines so-called search spaces, which describe the set of CCEs the terminal is supposed to monitor for scheduling assignments/grants relating to a certain component carrier.
  • a search space is a set of candidate control channels formed by CCEs on a given aggregation level, which the terminal is supposed to attempt to decode.
  • a terminal has multiple search spaces. In each subframe, the terminals will attempt to decode all the PDCCHs that can be formed from the CCEs in each of its search spaces. If the CRC checks, the content of the control channel is declared as valid for this terminal and the terminal processes the information (scheduling assignment, scheduling grants, etc.).
  • Each terminal in the system therefore has a terminal-specific search space at each aggregation level.
  • LTE has defined common search spaces in addition to the terminal-specific search spaces.
  • a common search space is, as the name implies, common, and all terminals in the cell monitor the CCEs in the common search spaces for control information.
  • the motivation for the common search space is primarily transmission of various system messages, it may be used to schedule individual terminals as well. Thus, it may be used to resolve situations where scheduling of one terminal is blocked due to lack of available resources in the terminal-specific search space. More important, the common search space is not dependent of user equipment configuration status. Therefore, the common search space may be used when the NW needs communicate with the user equipment during user equipment reconfiguration periods.
  • the L1/L2 control information e.g., channel-status reports, Hybrid-ARQ acknowledgments, and scheduling requests
  • uplink resources e.g., resource blocks, specifically assigned for uplink L1/L2 control on 3GPP Release 8 PUCCH.
  • resource blocks specifically assigned for uplink L1/L2 control on 3GPP Release 8 PUCCH.
  • These resources are located at the edges of the total available cell bandwidth.
  • Each such resource consists of 12 "subcarriers", e.g., one resource block, within each of the two slots of an uplink subframe.
  • these frequency resources are frequency hopping on the slot boundary, i.e., one "resource” consists of 12 subcarriers at the upper part of the spectrum within the first slot of a subframe and an equally sized resource at the lower part of the spectrum during the second slot of the subframe or vice versa. If more resources are needed for the uplink L1/L2 control signaling, e.g., in case of very large overall transmission bandwidth supporting a large number of users, additional resources blocks can be assigned next to the previously assigned resource blocks.
  • LTE Release 10 The LTE Release 10 standard has recently been standardized, supporting bandwidths larger than 20 MHz.
  • One important requirement on LTE Release 10 is to assure backward compatibility with LTE Release 8. This should also include spectrum compatibility. That would imply that an LTE Release 10 carrier, wider than 20 MHz, should appear as a number of LTE carriers to an LTE Release 8 terminal. Each such carrier may be referred to as a Component Carrier (CC).
  • CC Component Carrier
  • CA Carrier Aggregation
  • the number of aggregated CC as well as the bandwidth of the individual CC may be different for uplink and downlink.
  • a symmetric configuration refers to the case where the number of CCs in downlink and uplink is the same whereas an asymmetric configuration refers to the case that the number of CCs is different. It is important to note that the number of CCs configured in a cell may be different from the number of CCs seen by a terminal: A terminal may for example support more downlink CCs than uplink CCs, even though the cell is configured with the same number of uplink and downlink CCs.
  • a LTE Release 10 terminal behaves similar to a LTE Release 8 terminal.
  • a terminal may, depending on its own capabilities and the network, be configured with additional CCs in the UL and DL. Configuration is based on RRC. Due to the heavy signaling and rather slow speed of RRC signaling, it is envisioned that a terminal may be configured with multiple CCs even though not all of them are currently used. If a terminal is configured on multiple CCs this would imply it has to monitor all DL CCs for PDCCH and PDSCH. This implies a wider receiver bandwidth, higher sampling rates, etc., resulting in high power consumption.
  • LTE Release 10 supports activation of CCs on top of configuration.
  • the terminal monitors only configured and activated CCs for PDCCH and PDSCH. Since activation is based on Medium Access Control (MAC) control elements, which are faster than RRC signaling, activation/de-activation may follow the number of CCs that are required to fulfill the current data rate needs.
  • MAC Medium Access Control
  • Activation provides therefore the possibility to configure multiple CC but only activate them on a need basis. Most of the time a terminal would have one or very few CCs activated resulting in a lower reception bandwidth and thus battery consumption.
  • Scheduling of a CC is done on the PDCCH via downlink assignments.
  • Control information on the PDCCH is formatted as a Downlink Control Information (DCI) message.
  • DCI Downlink Control Information
  • a terminal only operates with one DL and one UL CC, the association between DL assignment, UL grants and the corresponding DL and UL CCs is therefore clear.
  • LTE Release 10 two modes of CA needs to be distinguished. The first case is very similar to the operation of multiple Release 8 terminals, a DL assignment or UL grant contained in a DCI message transmitted on a CC is either valid for the DL CC itself or for associated (either via cell-specific or UE specific linking) UL CC.
  • a second mode of operation augments a DCI message with the Carrier Indicator Field (CIF).
  • CIF Carrier Indicator Field
  • DCI messages for downlink assignments contain among others resource block assignment, modulation and coding scheme related parameters, HARQ redundancy version, etc.
  • DCI formats for downlink assignments also contain a bit field for Transmit Power Control (TPC) commands. These TPC commands are used to control the uplink power control behavior of the corresponding PUCCH that is used to transmit the HARQ feedback.
  • TPC Transmit Power Control
  • the transmission of PUCCH is mapped onto one specific uplink CC, the UL Primary CC (UL PCC).
  • Terminals only configured with a single DL CC, which is then the DL PCC, and UL CC, which is then the UL PCC, are operating dynamic ACK/NACK on PUCCH according to 3GPP Release 8.
  • the first Control Channel Element (CCE) used to transmit PDCCH for the DL assignment determines the dynamic ACK/NACK resource on 3GPP Release 8 PUCCH. Since only one DL CC is cell-specifically linked with the UL PCC no PUCCH collisions may occur since all PDCCH are transmitted using different first CCE.
  • CCE Control Channel Element
  • a PUCCH format (which is referred to as CA PUCCH herein) that can carry the HARQ-ACK of multiple serving cells should be used.
  • a DL SCC assignment alone is untypical.
  • the eNB scheduler should strive to schedule a single DL CC assignment on the DL PCC and try to de-activate SCCs if not needed.
  • a possible scenario that may occur is that eNB schedules terminal on multiple DL CCs including the PCC. If the terminal misses all but the DL PCC assignment it will use Release 8 PUCCH instead of CA PUCCH. To detect this error case eNB has to monitor both the Release 8 PUCCH and the CA PUCCH.
  • the CA PUCCH format is based on the number of configured CC.
  • Configuration of CC is based on RRC signaling. After successful reception/application of the new configuration a confirmation message is sent back making RRC signaling very safe.
  • CA PUCCH refers to means of transmitting HARQ-ACK of multiple serving cells in the UL.
  • CA PUCCH can be embodied in one of the following two approaches.
  • the first method is based on the use of PUCCH format 3 that is based on DFTS-OFDM.
  • the multiple ACK/NACK bits are encoded to form 48 coded bits.
  • the coded bits are then scrambled with cell-specific (and possibly DFTS-OFDM symbol dependent) sequences. 24 bits are transmitted within the first slot and the other 24 bits are transmitted within the second slot.
  • the 24 bits per slot are converted into 12 QPSK symbols, DFT precoded, spread across five DFTS-OFDM symbols and transmitted within one resource blocks (bandwidth) and five DFTS-OFDM symbols (time).
  • the spreading sequence is user equipment specific and enables multiplexing of up to five users within the same resource blocks.
  • cyclic shifted CAZAC sequences e.g., computer optimized sequences, may be used.
  • the second CA PUCCH method is called channel selection.
  • the basic principle is that the user equipment is assigned a set of PUCCH format 1a/1b resources. The user equipment then selects one of resources according to the ACK/NACK sequence the user equipment should transmit. On one of the assigned resources, the user equipment would then transmit a QPSK or BPSK. The eNB detects which resource the user equipment used and which QPSK or BPSK value the user equipment fed back on the used resource and combines this into a HARQ response for associated DL cells.
  • a similar type of mapping including a bundling approach is also done for TDD as in the FDD, in case the user equipment is configured with channel selection.
  • Transmission and reception from a node may be multiplexed in the frequency domain or in the time domain (or combinations thereof).
  • Frequency Division Duplex (FDD) as illustrated to the left in Figure 1 implies that downlink and uplink transmission take place in different, sufficiently separated, frequency bands.
  • Time Division Duplex (TDD) as illustrated to the right in Figure 1 , implies that downlink and uplink transmission take place in different, non-overlapping time slots.
  • TDD can operate in unpaired spectrum
  • FDD requires paired spectrum.
  • the structure of the transmitted signal in a communication system is organized in the form of a frame structure.
  • LTE uses ten equally-sized subframes of length 1 ms per radio frame as illustrated in Figure 2 .
  • FDD frequency division duplex
  • fUL uplink transmission
  • fDL downlink transmission
  • FDD may be either full duplex or half duplex.
  • a terminal may transmit and receive simultaneously, while in half-duplex operation, the terminal may not transmit and receive simultaneously.
  • the base station is capable of simultaneous reception/transmission though, e.g., receiving from one terminal while simultaneously transmitting to another terminal.
  • a half-duplex terminal is monitoring/receiving in the downlink except when explicitly being instructed to transmit in a certain subframe.
  • TDD operation illustrated in the lower section of Figure 2
  • uplink and downlink transmissions are always separated in time also on a cell basis.
  • both the base station and the mobile terminals need to switch from transmission to reception and vice versa.
  • An essential aspect of any TDD system is to provide the possibility for a sufficiently large guard time where neither downlink nor uplink transmissions occur. This is required to avoid interference between uplink and downlink transmissions.
  • this guard time is provided by special subframes, e.g., subframe 1 and, in some cases, subframe 6, which are split into three parts: a downlink part (DwPTS), a guard period (GP), and an uplink part (UpPTS).
  • DwPTS downlink part
  • GP guard period
  • UpPTS uplink part
  • TDD allows for different asymmetries in terms of the amount of resources allocated for uplink and downlink transmission, respectively, by means of different downlink/uplink configurations.
  • LTE there are seven different configurations as shown in Figure 3 . It should be appreciated that a DL subframe may mean either DL or the special subframe.
  • neighbor cells should have the same downlink/uplink configuration. If this is not done, uplink transmission in one cell may interfere with downlink transmission in the neighboring cell and vice versa. Hence, the downlink/uplink asymmetry may typically not vary between cells, but is signaled as part of the system information and remains fixed for a long period of time.
  • the PUSCH scheduling timing and the corresponding HARQ feedback PHICH timing are described extensively in 3GPP Technical Specification 36.213. A basic summary is provided below for discussing the example embodiments presented herein.
  • the user equipment shall upon detection of a PDCCH/ePDCCH with uplink DCI format and/or a PHICH transmission in subframe n intended for the user equipment, adjust the corresponding PUSCH transmission in subframe n + k , with k given in Table 8-2 of TS 36.213 (reproduced in Table 1 below), according to the PDCCH/ePDCCH and PHICH information.
  • Table 1 k for TDD configurations 0-6 TDD UL/DL Configuration subframe number n 0 1 2 3 4 5 6 7 8 9 0 4 6 4 6 1 6 4 6 4 2 4 4 3 4 4 4 4 4 4 5 4 6 7 7 7 5
  • TDD UL/DL configuration 1-6 if a user equipment is configured with one serving cell, or if the user equipment is configured with more than one serving cell and the TDD UL/DL configuration of all the configured serving cells is the same, an HARQ-ACK received on the PHICH assigned to a user equipment in subframe i is associated with the PUSCH transmission in the subframe i-k as indicated by the following Table 8.3-1 of TS 36.213 (reproduced below).
  • k 4.
  • TPC transmit power control
  • At least one example object of the example embodiments presented herein is to provide mechanisms to implement control timing configurations for establishing PUSCH and Physical HARQ-ACK control timing for a cell serving a user equipment in a FDD and TDD carrier aggregated network.
  • the example embodiments presented herein have the example advantage of providing a simple scheme to derive the subframes for the timing of HARQ and the scheduling for TDD and FDD aggregation.
  • some of the example embodiments are directed towards a method, in a base station, for determining a control timing configuration.
  • the control timing configuration provides a subframe timing setting for configuring PUSCH and uplink HARQ-ACK control timing for a cell serving a user equipment in a multiple cell communications network.
  • the user equipment is served by a TDD based cell and a FDD based cell.
  • the method comprises determining a control timing configuration for a secondary cell.
  • the secondary cell is one of the TDD based cell or the FDD based cell.
  • the determining is based on a type of a scheduling cell.
  • the type of the scheduling cell is one of the FDD based cell or the TDD based cell.
  • the method further comprises implementing the at least one control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment.
  • the control timing configuration provides a subframe timing setting for configuring PUSCH and uplink HARQ-ACK control timing for a cell serving a user equipment in a multiple cell communications network.
  • the user equipment is served by a TDD based cell and a FDD based cell.
  • the base station comprises processing circuitry configured to determine a control timing configuration for a secondary cell.
  • the secondary cell being one of the TDD based cell or the FDD based cell.
  • the processing circuitry is configured to determine the control timing configuration based on a type of the scheduling cell.
  • the type of the scheduling cell is one of the FDD based cell or the TDD based cell.
  • the processing circuitry is further configured to implement the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment.
  • Some of the example embodiments are directed towards a method, in a user equipment, for determining a control timing configuration.
  • the control timing configuration provides a subframe timing setting for configuring PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment in a multiple cell communications network.
  • the user equipment is served by a TDD based cell and a FDD based cell.
  • the method comprises determining a control timing configuration for a secondary cell.
  • the secondary cell is one of the TDD based cell or the FDD based cell.
  • the determining is based on a type of a scheduling cell.
  • the type of the scheduling cell is one of the FDD based cell or the TDD based cell.
  • the method further comprises implementing the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment.
  • the control timing configuration provides a subframe timing setting for configuring PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment in a multiple cell communications network.
  • the user equipment is served by a TDD based cell and a FDD based cell.
  • the user equipment comprises processing circuitry configured to determine a control timing configuration for a secondary cell.
  • the secondary cell is one of the TDD based cell or the FDD based cell.
  • the processing circuitry is configured to determine the control timing configuration based on a type of at least one scheduling cell. The type of the scheduling cell being one of the FDD based cell or the TDD based cell.
  • the processing circuitry is further configured to implement the at least one control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment.
  • carrier aggregation of TDD cells is specified with the restriction that the U/D configurations for all the aggregated cells are identical. The need to allow more flexible carrier aggregation of TDD cells is to be addressed in Release 11 of LTE.
  • the U/D configurations of neighboring cells need to be compatible to avoid severe interference problems.
  • the neighboring cells are operated by different operators or different wireless systems.
  • the LTE TDD cells adjacent to those neighboring systems are hence required to adopt certain compatible U/D configurations.
  • an operator may have several TDD cells having different U/D configurations on different frequencies.
  • WO2013/025143 and 3GPP TS 36.211 V11.1.0 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation (Release 11) taught that a user equipment is configured with at least one of two timing configuration numbers.
  • the first timing configuration number is a PDSCH HARQ control timing configuration number for determining PDSCH HARQ A/N timings across all aggregated cells.
  • the second timing configuration number is a PUSCH control timing configuration number for determining PUSCH scheduling and the corresponding HARQ A/N timings on PHICH across all aggregated cells.
  • FIG. 4A table 3 may be utilized to determine the UL HARQ control timing for a configuration 1 cell. Utilizing the n-k calculation, it is determined that such HARQ A/N feedbacks for PUSCH is transmitted from subframes 2, 3, 7 and 8 to subframes 6, 9, 1 and 4, respectively. Similarly, for a configuration 2 cell, utilizing the n-k calculation, Figure 4B illustrates HARQ A/N feedbacks for PUSCH are transmitted from subframes 2 and 7 to subframes 6 and 1, respectively.
  • the UL feedback is changed for the scheduled cell in some UL/DL configurations to allow more UL subframes to be scheduled.
  • Examples of such scheduling are provided in WO2013/025143 and 3GPP TS 36.211 V11.1.0 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation (Release 11) .
  • At least one example object of the example embodiments presented herein is to provide mechanisms to provide uplink scheduling and HARQ control timing for a FDD and TDD carrier aggregated network.
  • some of the example embodiments presented herein are directed towards how to allocate the HARQ timing and scheduling timing for PUSCH transmission, for example, UL HARQ.
  • an applicable reference configuration is selected for the HARQ timing.
  • the applicable scheduling and HARQ timing for a user equipment performing aggregation between a FDD carrier and a TDD carrier depends on which of the carriers the scheduling is performed from. In addition, what impacts the applicable timings are whether the user equipment is configured with cross-carrier scheduling or not.
  • the example embodiments are mostly described from the basis of only aggregation between two carriers although it is assumed that the aggregation may also be extended to more than two carriers.
  • the example embodiments will be presented as follows. First, example embodiments directed towards the FDD based cell functioning as the scheduling cell, as described under the heading " The FDD based cell as the scheduling cell ". Examples of scheduling for a TDD based SCell and a FDD based PCell are provided under the subheadings " Scheduled SCell follows FDD timing " and " Scheduled SCell follows TDD timing ".
  • TDD based cell functioning as the scheduling cell as described under the heading " The TDD based cell as the scheduling cell ".
  • the TDD based cell as the scheduling cell ".
  • Examples of such scheduling for the FDD based SCell and a TDD based PCell are provided under the subheadings " Scheduled SCell follows TDD timing ", " Scheduled SCell follows FDD timing ", " Scheduled SCell follows timing according to subframe hierarchy ", " FDD SCell scheduling based on revised tables " and " Cases where the PHICH is transmitted on the scheduled FDD cell ".
  • Example node configurations and example node operations are provided under the subheadings " Example node configuration " and " Example node operations ", respectively.
  • the scheduling cell may be the PCell or a different SCell. In the example embodiments described herein, it is SCell which is scheduled (i.e., the scheduled cell).
  • the FDD based cell as the scheduling cell
  • the HARQ-ACK for a PUSCH on a scheduled SCell is transmitted from the serving cell that carried the scheduling PDCCH/ePDCCH.
  • the PUSCH scheduling and PHICH timings of a TDD SCell shall follow those for the FDD scheduling cell. Subframes which map toward a DL subframe on the SCell are excluded from the timing.
  • Figure 5 illustrates a FDD based cell as the primary cell and the scheduling cell.
  • the secondary cell which is the scheduled cell, is a TDD based cell with a configuration of 1.
  • HARQ-ACK for PUSCH is scheduled with a timing value of 4 for all subframes for a PUSCH.
  • uplink subframes 7, 8, 2 and 3 of the TDD based cell are scheduled for HARQ-ACK to subframes 1, 2, 6 and 7, of the FDD based cell, respectively.
  • scheduled HARQ-ACK timings that map to a downlink subframe on the secondary scheduled TDD based cell are excluded from feedback.
  • the HARQ-ACK for a PUSCH on the scheduled SCell is transmitted from the scheduled SCell.
  • the PUSCH scheduling and PHICH timings of a TDD SCell shall follow its own timings as defined by its own UL/DL configuration. Such example embodiments are illustrated in Figure 6 .
  • Figure 6 illustrates a FDD based cell as the primary and the scheduling cell and the secondary and scheduled cell as a TDD based cell with a configuration of 1.
  • the scheduled cell follows HARQ-ACK timings according to table 3. Utilizing the n + k calculation, PUSCH from subframes 7, 8, 2 and 3 are scheduled for HARQ-ACK in subframes 1, 4, 6 and 9, respectively, in the TDD based cell.
  • the HARQ-ACK for a PUSCH on the scheduled SCell is transmitted from the serving cell that carried the scheduling PDCCH/ePDCCH.
  • the PUSCH scheduling and PHICH timings of a FDD SCell shall follow those for the TDD scheduling cell.
  • Such example embodiments are illustrated in Figure 7 and Figure 8 .
  • Figure 7 illustrates a FDD based SCell which is also the scheduled cell.
  • Figure 7 further illustrates a TDD based PCell with a configuration of 1 which is also the scheduling cell.
  • the solid lines indicate PUSCH scheduling timings and the dashed lines indicate PHICH timings.
  • four SCell UL subframes are to be schedulable, specifically, subframes 2, 3, 7 and 8. These subframes are scheduled according to table 3 via the n + k calculation.
  • HARQ-ACK timings for subframes 2, 3, 7 and 8 of the FDD based SCell are scheduled to subframes 6, 9, 1 and 4, respectively, of the TDD based PCell.
  • Figure 8 illustrates a FDD based SCell which is also the scheduled cell.
  • Figure 8 further illustrates a TDD based PCell with a configuration of 2 which is also the scheduling cell.
  • the solid lines indicate PUSCH scheduling timings and the dashed lines indicate PHICH timings.
  • two SCell UL subframes are schedulable, specifically, subframes 2 and 7. These subframes are scheduled according to table 3 via the n + k calculation.
  • HARQ-ACK timing for subframes 2 and 7 of the FDD based SCell are scheduled to subframes 8 and 3, respectively, of the TDD based PCell.
  • the PUSCH scheduling and PHICH timings of a FDD SCell shall follow its own timings. Specifically, the FDD SCell shall be scheduled with a timing value of 4 for all subframes for a PUSCH. It should be appreciated that FDD scheduling which maps to downlink subframes in the TDD based cell are excluded from PUSCH timing.
  • Figure 9 provides an illustrative example of such an embodiment.
  • the solid lines indicate PUSCH scheduling timings and the dashed lines indicate PHICH timings.
  • a TDD based PCell which is functioning as the scheduling cell, with a configuration of 1 is aggregated with a FDD based SCell, which is functioning as the scheduled cell.
  • two SCell UL subframes may be scheduled, specifically, subframes 0 and 5. Therefore, utilizing the timing value of 4 for all subframes, the PHICH for subframes 0 and 5 of the FDD based SCell are scheduled to subframes 4 and 9 of the TDD based PCell.
  • a HARQ-ACK scheduling of the FDD based cell subframe 3 is not possible as the PHICH for subframe 3 would be scheduled to subframe 7 of the TDD based cell, which is an UL cell.
  • Figure 10 provides another illustrative example of PUSCH scheduling and PHICH timings in which a FDD SCell follows its own timing.
  • the solid lines indicate PUSCH scheduling timings and the dashed lines indicate PHICH timings.
  • a TDD based PCell which is functioning as the scheduling cell
  • a configuration of 2 is aggregated with a FDD based SCell, which is functioning as the scheduled cell.
  • six SCell UL subframes may be scheduled, specifically, subframes 4, 5, 7, 9, 0 and 2.
  • subframes 4, 5, 7, 9, 0 and 2 of the FDD based SCell are scheduled to subframes 8, 9, 1, 3, 4 and 6 of the TDD based PCell. It should be appreciated that utilizing this example embodiment, a HARQ-ACK scheduling of the FDD based cell subframe 3 is not possible as subframe 3 would be scheduled to subframe 7 of the TDD based cell, which is an UL cell.
  • Scheduled SCell follows timing according to subframe hierarchy
  • the choice of which configuration the SCell shall use for determining HARQ control timing is based on a subframe hierarchy, as illustrated in Figure 11 . It should be appreciated that the hierarchical ordering of Figure 11 is further described in WO2013/025143 .
  • the subframe hierarchy may be designed with the following principles:
  • subframe 0, 1, 5, 6 and 9 are DL subframes in configuration 6. These five subframes are also DL in configurations 1, 2, 3, 4 and 5, all of which can be connected from configuration 6 with downward arrows.
  • subframe 7 is a DL subframe in configuration 3 but not a DL subframe in configuration 2 because there is no downward arrow connecting the two configurations.
  • subframe hierarchy may provide the following utility:
  • the PUSCH scheduling and PHICH timings of a FDD SCell shall follow those defined for a UL/DL configuration 0 TDD cell.
  • UL/DL configuration 6 could be used.
  • the advantage of this example embodiment is that six (or alternatively five) UL subframes on the FDD SCell may always be scheduled.
  • one example drawback may be that the PUSCH round trip time for the FDD SCell may become greater than 10ms.
  • Figure 12 illustrates an example of FDD SCell scheduling based on the subframe hierarchy as illustrated in Figure 11 .
  • the solid lines indicate PUSCH scheduling timings and the dashed lines indicate PHICH timings.
  • the FDD based SCell which functions as the scheduled cell, is aggregated with a TDD based PCell with a configuration of 1, which functions as the scheduling cell.
  • the FDD SCell provides HARQ-ACK timing via configuration 0 as provided in table 3.
  • subframes 2, 3, 4, 7, 8, and 9 of the FDD based SCell provide HARQ-ACK feedback to subframes 6, 0, 0, 1, 5 and 5, respectively, of the TDD based PCell.
  • Figure 13 illustrates another example of FDD SCell scheduling based on the subframe hierarchy as illustrated in Figure 11 .
  • the solid lines indicate PUSCH scheduling timings and the dashed lines indicate PHICH timings.
  • the FDD based SCell which functions as the scheduled cell, is aggregated with a TDD based PCell with a configuration of 2, which functions as the scheduling cell.
  • the FDD SCell provides HARQ-ACK timing via configuration 0 as provided in table 3.
  • subframes 2, 3, 4, 7, 8, and 9 of the FDD based SCell provide HARQ-ACK feedback to subframes 6, 0, 0, 1, 5 and 5, respectively, of the TDD based PCell.
  • FDD based SCells may be scheduled with the use of revised tables.
  • Such revised tables may be provided with the use of a combination of the above explained embodiments.
  • the PUSCH scheduling and PHICH timings of a FDD SCell shall follow: (1) UL/DL configuration 1 as the UL timing reference configuration if the UL/DL configuration of the scheduling TDD cell is 2, 4 or 5; and (2) UL/DL configuration of the scheduling cell as the UL timing reference configuration if the UL/DL configuration of the scheduling TDD cell is 0, 1, 3 or 6.
  • the power control of the PUSCH transmitted on the scheduled FDD Scell shall incorporate the transmit power control command transmitted within the scheduling DCI according to the above defined UL timing reference configuration.
  • the user equipment shall upon detection of a PDCCH/ePDCCH with uplink DCI format and/or a PHICH transmission in subframe n intended for the user equipment, adjust the corresponding PUSCH transmission in subframe n + k , with k given in Table 5.
  • the user equipment shall adjust the corresponding PUSCH transmission in subframe n +7. If both the MSB and LSB of the UL index in the PDCCH/ePDCCH with uplink DCI format are set in subframe n , the user equipment shall adjust the corresponding PUSCH transmission in both subframes n + k and n + 7 , with k given in Table 5.
  • an HARQ-ACK received on the PHICH assigned to a user equipment in subframe i is associated with the PUSCH transmission in the subframe i-k as indicated by the following Table 6.
  • the user equipment shall determine the corresponding PHICH resource of serving cell c in subframe n + k PHICH , where k PHICH is given in Table 7.
  • TPC transmit power control
  • the HARQ-ACK for a PUSCH on the scheduled SCell is transmitted on the scheduled cell.
  • the PUSCH scheduling and PHICH timings of a FDD SCell scheduled from a TDD cell shall follow: (1) UL/DL configuration 0 as the UL timing reference configuration if the UL/DL configuration of the scheduling TDD cell is 0; and (2) FDD PUSCH scheduling and PHICH timings if the UL/DL configuration of the scheduling TDD cell is 1-6.
  • the power control of the PUSCH transmitted on the scheduled FDD Scell shall incorporate the transmit power control command transmitted within the scheduling DCI according to the FDD serving cell timing.
  • the user equipment shall upon detection of a PDCCH/EPDCCH with uplink DCI format and/or a PHICH transmission in subframe n intended for the user equipment, adjust the corresponding PUSCH transmission in subframe n + k , with k given in Table 9 .
  • the user equipment shall adjust the corresponding PUSCH transmission in subframe n +7. If both the MSB and LSB of the UL index in the PDCCH/EPDCCH with uplink DCI format are set in subframe n , the user equipment shall adjust the corresponding PUSCH transmission in both subframes n + k and n + 7 , with k given in Table 9 .
  • an HARQ-ACK received on the PHICH assigned to a UE in subframe i is associated with the PUSCH transmission in the subframe i-k as indicated by the following Table 10 .
  • the user equipment shall determine the corresponding PHICH resource of serving cell c in subframe n + k PHICH , where k PHICH is given in Table 11 .
  • Table 11 Effective k PHICH for a FDD SCell scheduled from a TDD cell TDD UL/DL Configuration of the scheduling cell subframe index n 0 1 2 3 4 5 6 7 8 9 0 4 7 6 4 7 6 1 4 4 4 4 4 4 4 2 4 4 4 4 4 4 4 4 4 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
  • TPC transmit power control
  • Figure 14 is an illustrative example of FDD based SCell scheduling based on the revised tables presented above.
  • the solid lines indicate PUSCH scheduling timings and the dashed lines indicate PHICH timings.
  • a FDD based SCell which functions as the scheduled cell, is aggregated with a TDD based PCell with a configuration number of 1, which functions as the scheduling cell.
  • table 11 is used to determine the HARQ-ACK feedback timing.
  • subframes 4, 5, 8, 9, 0 and 3 of the FDD based scheduled cell are scheduled to subframes 8, 9, 2, 3, 4 and 7, respectively, of the FDD based scheduled cell.
  • Figure 15 is an illustrative another example of FDD based SCell scheduling based on the revised tables presented above.
  • the solid lines indicate PUSCH scheduling timings and the dashed lines indicate PHICH timings.
  • a FDD based SCell which functions as the scheduled cell, is aggregated with a TDD based PCell with a configuration number of 2, which functions as the scheduling cell.
  • table 11 is used to determine the HARQ-ACK feedback timing.
  • subframes4, 5, 7, 8, 9, 0, 1 and 2 of the FDD based scheduled cell are scheduled to subframes 8, 9, 1, 2, 3, 4, 5 and 6, respectively, of the FDD based scheduled cell.
  • FIG 16 illustrates an example node configuration of a base station 401 which may perform some of the example embodiments described herein.
  • the base station 401 may comprise radio circuitry or a communication port 410 that may be configured to receive and/or transmit communication data, instructions, and/or messages.
  • the radio circuitry or communication port 410 may comprise any number of transceiving, receiving, and/or transmitting units or circuitry.
  • the radio circuitry or communication port 410 may be in the form of any input or output communications port known in the art.
  • the radio circuitry or communication port 410 may comprise RF circuitry and baseband processing circuitry (not shown).
  • the base station 401 may also comprise a processing unit or circuitry 420 which may be configured to implement HARQ-ACK control timing as described herein.
  • the processing circuitry 420 may be any suitable type of computation unit, for example, a microprocessor, digital signal processor (DSP), field programmable gate array (FPGA), or application specific integrated circuit (ASIC), or any other form of circuitry.
  • the base station 401 may further comprise a memory unit or circuitry 430 which may be any suitable type of computer readable memory and may be of volatile and/or non-volatile type.
  • the memory 430 may be configured to store received, transmitted, and/or measured data, device parameters, communication priorities, and/or executable program instructions, e.g., scheduling instructions.
  • the memory 430 may also be configured to store any form of configuration tables as described herein.
  • FIG 17 illustrates an example node configuration of a user equipment 501 which may perform some of the example embodiments described herein.
  • the user equipment 501 may comprise radio circuitry or a communication port 510 that may be configured to receive and/or transmit communication data, instructions, and/or messages.
  • the radio circuitry or communication port 510 may comprise any number of transceiving, receiving, and/or transmitting units or circuitry.
  • the radio circuitry or communication port 510 may be in the form of any input or output communications port known in the art.
  • the radio circuitry or communication port 510 may comprise RF circuitry and baseband processing circuitry (not shown).
  • the user equipment 501 may also comprise a processing unit or circuitry 520 which may be configured to implement HARQ-ACK control timing, as described herein.
  • the processing circuitry 520 may be any suitable type of computation unit, for example, a microprocessor, digital signal processor (DSP), field programmable gate array (FPGA), or application specific integrated circuit (ASIC), or any other form of circuitry.
  • the user equipment 501 may further comprise a memory unit or circuitry 530 which may be any suitable type of computer readable memory and may be of volatile and/or non-volatile type.
  • the memory 530 may be configured to store received, transmitted, and/or measured data, device parameters, communication priorities, and/or executable program instructions, e.g., scheduling instructions.
  • the memory 530 may also be configured to store any form of configuration tables as described herein.
  • Figure 18 is a flow diagram depicting example operations which may be performed by the base station 401 as described herein to implement HARQ-ACK control timing, as described herein. It should be appreciated that Figure 18 comprises some operations which are illustrated with a solid border and some operations which are illustrated with a dashed border. The operations which are comprised in a solid border are operations which are comprised in the broadest example embodiment. The operations which are comprised in a dashed border are example embodiments which may be comprised in, or a part of, or are further operations which may be performed in addition to the operations of the broader example embodiments. It should be appreciated that these operations need not be performed in order. Furthermore, it should be appreciated that not all of the operations need to be performed. The example operations may be performed in any order and in any combination.
  • the example operations of Figure 18 describe a base station, and corresponding method, for determining a control timing configuration.
  • the control timing configuration provides a subframe timing setting for configuration PUSCH and uplink HARQ-ACK control timing for a cell serving a user equipment in a multiple cell communications network.
  • the user equipment is served by a TDD based cell and a FDD based cell.
  • the base station 401 is configured to determine a control timing configuration for a secondary cell.
  • the secondary cell is one of the TDD based cell or the FDD based cell.
  • the determination of the control timing configuration is based on a type of the scheduling cell.
  • the type of the scheduling cell is either FDD or TDD.
  • the processing circuitry 420 is configured to determine the control timing configuration for the secondary cell.
  • the determining 10 may further comprise determining 12 the control timing configuration to comprise a transmission timing value of 4 for all subframes for a PUSCH, where downlink subframes of the scheduling cell which map to downlink subframes of the secondary cell are excluded from PUSCH timing.
  • the processing circuitry 420 is configured to determine the control timing configuration to comprise a transmission timing value of 4 for all subframes for a PUSCH, where downlink subframes of the scheduling cell which map to downlink subframes of the secondary cell are excluded from PUSCH timing.
  • the secondary cell may be either the FDD based cell or the TDD based cell.
  • the scheduling cell may be the TDD based cell or the FDD based cell.
  • An example of operation 12 is provided under at least the heading "The FDD based cell as the scheduling cell” and subheading "Scheduled SCell follows FDD timing", as well as Figure 5 .
  • the TDD based SCell follows FDD timing, specifically, a timing value of 4 is utilized for all subframes for a PUSCH.
  • a further example of operation 12 is provided under the heading "The TDD based cell as the scheduling cell” and subheading "Scheduled SCell follows FDD timing", as well as Figures 9 and 10 .
  • the FDD based SCell follows its own timing, specifically, a timing value of 4 is utilized for all subframes for a PUSCH.
  • the determining 10 may further comprise determining 14 the control timing configuration to be equivalent to a TDD configuration of the TDD based cell.
  • the processing circuitry 420 is configured to determine the control timing configuration to be equivalent to a TDD configuration of the TDD based cell.
  • the secondary cell may be either the FDD based cell or the TDD based cell.
  • the scheduling cell may be the TDD based cell or the FDD based cell.
  • the TDD based cell as the scheduling cell " and subheading " Scheduled SCell follows TDD timing ", as well as Figures 7 and 8 .
  • the FDD based SCell follows the control timing according to the configuration of the TDD based PCell, which functions as the scheduling cell.
  • the FDD based SCell follows the control timing according to configuration 1, which is the configuration of the TDD based PCell.
  • the FDD based SCell follows control timing according to configuration 2, which is the configuration of the scheduling TDD based PCell.
  • the secondary cell is the FDD based cell and the scheduling cell is the TDD based cell.
  • the determining 10 further comprises determining 16 the control timing configuration to be equivalent to a configuration number of 0 or 6.
  • the processing circuitry 420 is configured to determine the control timing configuration to be equivalent to a configuration number of 0 or 6.
  • Example operation 16 is further described under at least the heading "The TDD based cell as the scheduling cell " and the subheading " Scheduled SCell follows timing according to subframe hierarchy " and Figures 12 and 13 .
  • scheduling based on a subframe hierarchy provides that either a configuration of 0 or 6 is chosen for scheduling the FDD based SCell. It should be appreciated that the choice of a configuration number of 0 or 6 is provided with respect to a subframe hierarchy as explained in Figure 11 .
  • a FDD based SCell functioning as the scheduled cell, is aggregated with a TDD based PCell with a configuration of 1, functioning as the scheduling cell.
  • the FDD based SCell is scheduled with a configuration of 0 as provided by the subframe hierarchy of Figure 11 .
  • Figure 13 illustrates a FDD based SCell, functioning as the scheduled cell, is aggregated with a TDD based PCell with a configuration of 2, functioning as the scheduling cell.
  • the FDD based SCell is scheduled with a configuration of 0 as provided by the subframe hierarchy of Figure 11 .
  • the scheduling cell is the TDD based cell and the secondary cell is the FDD based cell.
  • the determining 10 may further comprise determining 18 the control timing configuration to be configuration number 1 if a configuration number of the scheduling cell is 2, 4 or 5.
  • the processing circuitry 420 is configure to determine the control timing configuration to be configuration number 1 if a configuration number of the scheduling cell is 2, 4 or 5.
  • Example operation 18 is further described under at least the heading " The TDD based cell as the scheduling cell " and subheading "FDD SCell scheduling based on revised tables” as well as tables 5-8.
  • tables 5-8 for configurations 2, 4 and 5, the k values of configuration 1 have been provided from tables 1-4, respectively. All other configurations of tables 5-8 comprise the normal configurations as provided in tables 1-4, respectively. Thus, tables 5-8 are revised tables.
  • the operation of determining 10 and the example operation of determining 18 may further comprise, if the configuration number of the scheduling cell is not 2, 4 or 5, determining 20 the control timing configuration to be equivalent to the configuration number of the scheduling cell.
  • the processing circuitry 420 is configured to determine the control timing configuration to be equivalent to the configuration number of the scheduling cell.
  • Example operation 20 is further described under at least the heading " The TDD based cell as the scheduling cell " and subheading " FDD SCell scheduling based on revised tables " as well as tables 5-8.
  • tables 5-8 for configurations 2, 4 and 5, the k values of configuration 1 have been provided from tables 1-4, respectively. All other configurations of tables 5-8 comprise the normal configurations as provided in tables 1-4, respectively. Thus, tables 5-8 are revised tables.
  • the scheduling cell is the TDD based cell and the secondary cell is the FDD based cell.
  • the HARQ-ACK is transmitted on the secondary cell.
  • the determining 10 may further comprise determining 22 the control timing configuration to be configuration number 0 if the configuration of the scheduling cell is 0.
  • the processing circuitry 420 is configured determine the control timing configuration to be configuration number 0 if the configuration of the scheduling cell is 0.
  • Example operation 22 is further described under at least the heading " The TDD based cell as the scheduling cell " and subheading " Cases where the PHICH is transmitted on the scheduled FDD cell " as well as tables 9-12.
  • tables 9-12 for configuration 0, the k values of configuration 0 have been provided from tables 1-4, respectively. All other configurations of tables 9-12 comprise FDD timing values, specifically a timing value of 4 for all subframes for a PUSCH. It should be appreciated that the tables for configurations 1-6 are constructed in order to exclude downlink subframes of the FDD based cell to map to uplink subframes of the TDD based PCell (e.g., the scheduling cell). Thus, tables 9-12 are revised tables.
  • the operation of determining 10 and the example operation of determining 22 further comprise, if the configuration number of the scheduling cell is not 0, determining 24 the control timing configuration to be a HARQ-ACK feedback timing value of 4 for a subframe in which a corresponding TDD subframe, for a same configuration number, is a downlink subframe.
  • the processing circuitry 420 is configured to determine the control timing configuration to be a HARQ-ACK feedback timing value of 4 for a subframe in which a corresponding TDD subframe, for a same configuration number, is a downlink subframe.
  • Example operation 24 is further described under at least the heading "The TDD based cell as the scheduling cell " and subheading " Cases where the PHICH is transmitted on the scheduled FDD cell " as well as tables 9-12.
  • tables 9-12 for configuration 0, the k values of configuration 0 have been provided from tables 1-4, respectively. All other configurations of tables 9-12 comprise FDD timing values, specifically a timing value of 4 for all subframes for a PUSCH. It should be appreciated that the tables for configurations 1-6 are constructed in order to exclude downlink subframes of the FDD based cell to map to uplink subframes of the TDD based PCell (e.g., the scheduling cell). Thus, tables 9-12 are revised tables.
  • the base station is further configured to implement the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment.
  • the processing circuitry 420 is configured to implement the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment.
  • the base station may be further configured to send, to the user equipment, the implemented control timing configuration via RRC signalling.
  • the radio circuitry 410 is configured to send, to the user equipment, the implement control timing configuration via RRC signalling.
  • Figure 19 is a flow diagram depicting example operations which may be performed by the user equipment 501 as described herein to implement HARQ-ACK control timing, as described herein. It should be appreciated that Figure 19 comprises some operations which are illustrated with a solid border and some operations which are illustrated with a dashed border.
  • the operations which are comprised in a solid border are operations which are comprised in the broadest example embodiment.
  • the operations which are comprised in a dashed border are example embodiments which may be comprised in, or a part of, or are further operations which may be performed in addition to the operations of the broader example embodiments. It should be appreciated that these operations need not be performed in order. Furthermore, it should be appreciated that not all of the operations need to be performed.
  • the example operations may be performed in any order and in any combination.
  • the example operations of Figure 19 describe a user equipment, and corresponding method, for determining a control timing configuration.
  • the control timing configuration provides a subframe timing setting for configuration PUSCH and uplink HARQ-ACK control timing for a cell serving a user equipment in a multiple cell communications network.
  • the user equipment is served by a TDD based cell and a FDD based cell.
  • the user equipment 501 is configured to determine a control timing configuration for a secondary cell.
  • the secondary cell is one of the TDD based cell or the FDD based cell.
  • the determination of the control timing configuration is based on a type of the scheduling cell.
  • the type of the scheduling cell is either FDD or TDD.
  • the processing circuitry 520 is configured to determine the control timing configuration for the secondary cell.
  • the determining 30 may further comprise determining 32 the control timing configuration to comprise a transmission timing value of 4 for all subframes for a PUSCH, where downlink subframes of the scheduling cell which map to downlink subframes of the secondary cell are excluded form PUSCH timing.
  • the processing circuitry 520 is configured to determine the control timing configuration to comprise a transmission timing value of 4 for all subframes for a PUSCH, where downlink subframes of the scheduling cell which map to downlink subframes of the secondary cell are excluded from PUSCH timing.
  • the secondary cell may be either the FDD based cell or the TDD based cell.
  • the scheduling cell may be the TDD based cell or the FDD based cell.
  • An example of operation 32 is provided under at least the heading "The FDD based cell as the scheduling cell” and subheading "Scheduled SCell follows FDD timing", as well as Figure 5 .
  • the TDD based SCell follows FDD timing, specifically, a timing value of 4 is utilized for all subframes for a PUSCH.
  • a further example of operation 32 is provided under the heading "
  • the TDD based cell as the scheduling cell " and subheading " Scheduled SCell follows FDD timing ", as well as Figures 9 and 10 .
  • the FDD based SCell follows its own timing, specifically, a timing value of 4 is utilized for all subframes for a PUSCH.
  • the determining 30 may further comprise determining 34 the control timing configuration to be equivalent to a TDD configuration of the TDD based cell.
  • the processing circuitry 520 is configured to determine the control timing configuration to be equivalent to a TDD configuration of the TDD based cell.
  • the secondary cell may be either the FDD based cell or the TDD based cell.
  • the scheduling cell may be the TDD based cell or the FDD based cell.
  • TDD timing An example of operation 34 is provided under at least the heading "The FDD based cell as the scheduling cell" and subheading "Scheduled SCell follows TDD timing", as well as Figure 6 .
  • a TDD based SCell follows its own configuration.
  • the TDD based SCell follows control timing according to configuration 1, which is the configuration of the TDD based SCell.
  • TDD based cell as the scheduling cell " and subheading " Scheduled SCell follows TDD timing ", as well as Figures 7 and 8 .
  • the FDD based SCell follows the control timing according to the configuration of the TDD based PCell, which functions as the scheduling cell.
  • the FDD based SCell follows the control timing according to configuration 1, which is the configuration of the TDD based PCell.
  • configuration 1 which is the configuration of the TDD based PCell.
  • configuration 2 which is the configuration of the scheduling TDD based PCell.
  • the secondary cell is the FDD based cell and the scheduling cell is the TDD based cell.
  • the determining 30 further comprises determining 36 the control timing configuration to be equivalent to a configuration number of 0 or 6.
  • the processing circuitry 520 is configured to determine the control timing configuration to be equivalent to a configuration number of 0 or 6.
  • Example operation 36 is further described under at least the heading " The TDD based cell as the scheduling cell " and the subheading " Scheduled SCell follows timing according to subframe hierarchy " and Figures 12 and 13 .
  • scheduling based on a subframe hierarchy provides that either a configuration of 0 or 6 is chosen for scheduling the FDD based SCell. It should be appreciated that the choice of a configuration number of 0 or 6 is provided with respect to a subframe hierarchy as explained in Figure 11 .
  • a FDD based SCell functioning as the scheduled cell, is aggregated with a TDD based PCell with a configuration of 1, functioning as the scheduling cell.
  • the FDD based SCell is scheduled with a configuration of 0 as provided by the subframe hierarchy of Figure 11 .
  • Figure 13 illustrates a FDD based SCell, functioning as the scheduled cell, is aggregated with a TDD based PCell with a configuration of 2, functioning as the scheduling cell.
  • the FDD based SCell is scheduled with a configuration of 0 as provided by the subframe hierarchy of Figure 11 .
  • the scheduling cell is the TDD based cell and the secondary cell is the FDD based cell.
  • the determining 30 may further comprise determining 38 the control timing configuration to be configuration number 1 if a configuration number of the scheduling cell is 2, 4 or 5.
  • the processing circuitry 520 is configured to determine the control timing configuration to be configuration number 1 if a configuration number of the scheduling cell is 2, 4 or 5.
  • Example operation 38 is further described under at least the heading "The TDD based cell as the scheduling cell " and subheading "FDD SCell scheduling based on revised tables” as well as tables 5-8.
  • tables 5-8 for configurations 2, 4 and 5, the k values of configuration 1 have been provided from tables 1-4, respectively. All other configurations of tables 5-8 comprise the normal configurations as provided in tables 1-4, respectively. Thus, tables 5-8 are revised tables.
  • the operation of determining 30 and the example operation of determining 38 may further comprise, if the configuration number of the scheduling cell is not 2, 4 or 5, determining 40 the control timing configuration to be equivalent to the configuration number of the scheduling cell.
  • the processing circuitry 520 is configured to determine the control timing configuration to be equivalent to the configuration number of the scheduling cell.
  • Example operation 40 is further described under at least the heading "The TDD based cell as the scheduling cell " and subheading " FDD SCell scheduling based on revised tables " as well as tables 5-8.
  • tables 5-8 for configurations 2, 4 and 5, the k values of configuration 1 have been provided from tables 1-4, respectively. All other configurations of tables 5-8 comprise the normal configurations as provided in tables 1-4, respectively. Thus, tables 5-8 are revised tables.
  • the scheduling cell is the TDD based cell and the secondary cell is the FDD based cell.
  • the HARQ-ACK is transmitted on the secondary cell.
  • the determining 30 may further comprise determining 42 the control timing configuration to be configuration number 0 if the configuration of the scheduling cell is 0.
  • the processing circuitry 520 is configured determine the control timing configuration to be configuration number 0 if the configuration of the scheduling cell is 0.
  • Example operation 42 is further described under at least the heading "The TDD based cell as the scheduling cell " and subheading " Cases where the PHICH is transmitted on the scheduled FDD cell " as well as tables 9-12.
  • tables 9-12 for configuration 0, the k values of configuration 0 have been provided from tables 1-4, respectively. All other configurations of tables 9-12 comprise FDD timing values, specifically a timing value of 4 for all subframes for a PUSCH. It should be appreciated that the tables for configurations 1-6 are constructed in order to exclude downlink subframes of the FDD based cell to map to uplink subframes of the TDD based PCell (e.g., the scheduling cell). Thus, tables 9-12 are revised tables.
  • the operation of determining 30 and the example operation of determining 42 further comprise, if the configuration number of the scheduling cell is not 0, determining 44 the control timing configuration to be a HARQ-ACK feedback timing value of 4 for a subframe in which a corresponding TDD subframe, for a same configuration number, is a downlink subframe.
  • the processing circuitry 520 is configured to determine the control timing configuration to be a HARQ-ACK feedback timing value of 4 for a subframe in which a corresponding TDD subframe, for a same configuration number, is a downlink subframe.
  • Example operation 44 is further described under at least the heading " The TDD based cell as the scheduling cell " and subheading " Cases where the PHICH is transmitted on the scheduled FDD cell " as well as tables 9-12.
  • tables 9-12 for configuration 0, the k values of configuration 0 have been provided from tables 1-4, respectively. All other configurations of tables 9-12 comprise FDD timing values, specifically a timing value of 4 for all subframes for a PUSCH. It should be appreciated that the tables for configurations 1-6 are constructed in order to exclude downlink subframes of the FDD based cell to map to uplink subframes of the TDD based PCell (e.g., the scheduling cell). Thus, tables 9-12 are revised tables.
  • the determining 30 may further comprise receiving, from the base station, the control timing configuration via RRC signalling.
  • the radio circuitry 510 is configured to receive, from the base station, the control timing configuration via RRC signalling.
  • the user equipment is further configured to implement 48 the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment.
  • the processing circuitry 520 is configured to implement the control timing configuration for PUSCH and uplink HARQ-ACK control timing for a cell serving the user equipment.
  • a wireless terminal or user equipment as the term is used herein, is to be broadly interpreted to comprise a radiotelephone having ability for Internet/intranet access, web browser, organizer, calendar, a camera, e.g., video and/or still image camera, a sound recorder, e.g., a microphone, and/or global positioning system (GPS) receiver; a personal communications system (PCS) user equipment that may combine a cellular radiotelephone with data processing; a personal digital assistant (PDA) that can comprise a radiotelephone or wireless communication system; a laptop; a camera, e.g., video and/or still image camera, having communication ability; and any other computation or communication device capable of transceiving, such as a personal computer, a home entertainment system, a television, etc.
  • PDA personal digital assistant
  • the term user equipment may also comprise any number of connected devices, wireless terminals or machine-to-machine devices.
  • dual connectivity should not be limited to a user equipment or wireless terminal being connected to only two base stations.
  • a wireless terminal may be connected to any number of base stations.
  • a computer-readable medium may comprise removable and non-removable storage devices comprising, but not limited to, Read Only Memory (ROM), Random Access Memory (RAM), compact discs (CDs), digital versatile discs (DVD), etc.
  • program modules may comprise routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types.
  • Computer-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
EP19189125.8A 2013-08-23 2013-10-16 Noeud et procédé de programmation de liaison montante et synchronisation de demande de répétition automatique hybride Active EP3582427B1 (fr)

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EP13785670.4A EP3036856B1 (fr) 2013-08-23 2013-10-16 Un noeud et procédé de programmation de liaison montante et de synchronisation de requêtes hybrides automatiques de répétition

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EP3036856A1 (fr) 2016-06-29
US20150271837A1 (en) 2015-09-24
US11012200B2 (en) 2021-05-18
US9510361B2 (en) 2016-11-29
US20170054532A1 (en) 2017-02-23
US20210266114A1 (en) 2021-08-26
DK3036856T3 (da) 2019-11-04
EP3582427B1 (fr) 2021-12-22
EP3036856B1 (fr) 2019-08-14
WO2015026274A1 (fr) 2015-02-26

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